Ophthalmic mounting and method



F. A. STEVENS ET AL Sept. 27, 1927. I I 1,643,909

OPHTHALMIC MOUNTING AND METHOD Filed Aug. 21, 1922 Z 72 veni'oraf-Patented Sept. 27, 1927.

.uairsn STATES PATENT OFFICE.

FREDERICK A. STEVENS AND JAMES VJ.

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ASE; GNGRS, :sr ransnn ssronrcnnrs, TO BAUSCI-I ilvn nor/1B orrroar,COMPANY, or ROCHESTER, NEW YORK, A CORPORATION or ew YQRK.

OPHTHALMIC MOUNTING AND METHOD.

Application filed August 21, 1922. Serial No. 583,253.

The present invention relates to ophthalmic mountings, and the object ofthe invention is to improveupon present-day connections between thebodies. of such mountings and posts, dowels and the like that are se=cured thereto. The present application is a continuation in part ofcopending application, Serial No. 379,788, filed May 8, 1920, whichmatured on December 30, 1924, into Patent 150. 1,521,484.

The posts about which the guard levers of linger piece eyeglasses arepivoted, the posts or dowels about which spectacle temples are pivoted,and posts used for other like purposes in ophthalmic mountings, areusnall intended to be rigidly secured to their supports. The desiredrigid connection is not often satisfactorily attained in practice.

The dowels that are provided upon temple.

end pieces, for example, usually constructed, are so insecurely mountedthat a comparatively small force exerted upon their free ends issufficient to drive them through their supporting end pieces. It hasbeen suggested to form the posts integral with their mountii'igs, butthis introduces dilliculties in manufacture that have caused the sgestion to meet with disfavor. The ternsl portion of the post isfrequently hammered or riveted over to secure the post in place.l'lammcring riveting processes, however, introduce an iuiattractiveappearance that repels purchasers, and the hamme ed or riveted joint,furthermore, has a tendency to work loose.

According to the present invention, the mounting is provided with a boreand the post is provided with a head that is mounted in the bore, thematerial near the wall of the bore being swaged against the head of thepost to secure it in place. The bore need extend from one face of themounting but part way to the opposite face, greatly improving theappearance.

The invention consists of the improved ophthalmic mounting hereinafterdescribed, illustrated in the accompanying drawings, and defined in theappended claims. It will now be described in connection with theaccompanying drawings, in which Fig. 1 is a fragmentary perspective Viewof a fingerpiece eyeglass mounting constructed according to a preferredembodiment of the present invention; Figs. 2, 3, 4 and 5 are longitudivnal, sections of modifications; Fig. 6 is a plan 5 applicable to.mountings thistype in s which the post 10 is rigidly secured. to thesupport 4.

According to. the preferred construction, illustrated in 1, the support4 is initially provided with a polygonal bore 201 that GX- tends fromone face 2-2 of the support but part way to. the opposite face 24. Thepost 10 is. provided with a similarly polygonal head 26. The head 26 isseated in the bore 20, after which the material. near the walls of the.here is swaged over against the head and thebody of the post. A veryrigid con nection is the result.

. As shown in Figs. 2, 3 and 4, the neck 28 between the head: 26 and thebody of the post may be reduced in cross section, providing a channelwithin which the swaged material of the support may be forced. Thesurface of the neck 28may be tapering, Fig. 2, cylindrical, Fig. 3,rounded, Fig. 4, or of any other desired conformation.

A somewhat different construction is shown in Figs. 5 and 6. Theenlarged head 30 seats upon a shoulder 32 of a countersunk bore 34formed in the support 4, the larger dimensions of the bore being equalto the dimensions of the enlarged head. The bore 34 extends through fromthe face 22 to the opposite face 24. The head is provided intermediateof the post 36, the portion 38 of the post on the otherside of the headextending through the bore to the face 24, where it is riveted over at40. This construction is not so attractive as the others above describedbecause of the riveted-over portion 40 of the post, but the polygonalshape of the head 30 and of the corresponding portion of the bore 34render the structure very effective inuse.

The dowel or post 42 about which the temple 4.4 is pivoted ismountedupon the temple end piece 46 very much as the post 10 is mounted uponthe suppo t 4 of Fig. 1.

The cylindrical bore 48 in the other end piece 50, like the polygonalbore 20 in the end piece 46, extends but part way through the end piece50. When, therefore, the end pieces are secured together, with thetemple in place between them, as shown in Fig. 7, no sign of the dowelis anywhere visible, the outer faces of the end pieces being thus rendered smooth and attractive. The elimination of the customary rings fromthe outer faces of the end pieces furthermore provides one lessdirt-collecting agency upon the temple mounting.

In the construction of Fi g. 8, the enlarged head 52 seats upon theshoulder 54 of a countersunk bore 56 formed in the end piece 46, thelarger diameter of the bore being equal to the diameter of the enlargedhead. The material near the wall of the bore is then swaged in againstthe head and that portion of the body of the dowel that is mounted'inthe bore, as shown at 58, thus securing the dowel firmly in place. Theengagement of the head 52 with the shoulder 54: effectually prevents theterminal portion 60 of the dowel, which lies in the reduced portion ofthe bore, from being forced through the face 24 of the end piece.

Though the drawings show the invention in its preferred embodiment, itwill be understood that this is for illustrative purposes purely andthat the invention is not re stricted thereto, but is of broad scope,unlimited except in so far as limitations may be specifically imposed inthe appended claims.

What is claimed as new is:

1. An ophthalmic mounting having a polygonal bore extending from onefacepart way to the opposite face, and a post having a similarlypolygonal head permanently se- 7 cured in the bore.

2. An ophthalmic mounting having a polygonal bore extending from oneface part way to the opposite face, and a post having an enlargedpolygonal head and a portion of its body permanently secured in thebore,

countersunk bore extending from one'face part way to the opposite face,and a post secured in the bore having an enlarged head. in the enlargedportion of the bore and a portion in the remaining portion of the bore.

a. An ophthalmic mounting having a bore extending from one face part wayto the opposite face, and a post in the bore having means for preventingits becoming loosened from the bore.

5. The method of making an ophthalmic mounting that comprises providinga mounting with a polygonal bore that extends from one face of themounting part wayv to the opposite face, inserting in the bore a posthaving a polygonal head with the polygonal" head in the bore, andswaging the material of the mounting against the head and the body ofthe post.

In testimony whereof, we have hereunto subscribed our names this 15thday of August, 1922.

FREDERICK A. STEVENS. JAMES l/V. WELSH.

